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Merge pull request #5042 from narunlifescience/master

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volume slider handle glow effect using system theme
This commit is contained in:
John Maguire 2015-09-21 20:25:54 +01:00
commit c6e56813ef
2 changed files with 52 additions and 25 deletions
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73
src/widgets/sliderwidget.cpp
View File

@ -195,32 +195,14 @@ Amarok::VolumeSlider::VolumeSlider(QWidget* parent, uint max)
: Amarok::Slider(Qt::Horizontal, parent, max),
m_animCount(0),
m_animTimer(new QTimer(this)),
m_pixmapInset(QPixmap(volumePixmapDraw ())) {
m_pixmapInset(QPixmap(drawVolumePixmap ())) {
setFocusPolicy(Qt::NoFocus);
// Store window text color to check theme change at paintEvent
// Store theme colors to check theme change at paintEvent
m_previous_theme_text_color = palette().color(QPalette::WindowText);
m_previous_theme_highlight_color = palette().color(QPalette::Highlight);
// BEGIN Calculate handle animation pixmaps for mouse-over effect
QImage pixmapHandle(":volumeslider-handle.png");
QImage pixmapHandleGlow(":volumeslider-handle_glow.png");
float opacity = 0.0;
const float step = 1.0 / ANIM_MAX;
QImage dst;
for (int i = 0; i < ANIM_MAX; ++i) {
dst = pixmapHandle.copy();
QPainter p(&dst);
p.setOpacity(opacity);
p.drawImage(0, 0, pixmapHandleGlow);
p.end();
m_handlePixmaps.append(QPixmap::fromImage(dst));
opacity += step;
}
// END
drawVolumeSliderHandle();
generateGradient();
setMinimumWidth(m_pixmapInset.width());
@ -306,10 +288,15 @@ void Amarok::VolumeSlider::paintEvent(QPaintEvent*) {
// If theme changed since last paintEvent, redraw the volume pixmap with new theme colors
if (m_previous_theme_text_color != palette().color(QPalette::WindowText)) {
m_pixmapInset = volumePixmapDraw();
m_pixmapInset = drawVolumePixmap();
m_previous_theme_text_color = palette().color(QPalette::WindowText);
}
if (m_previous_theme_highlight_color != palette().color(QPalette::Highlight)) {
drawVolumeSliderHandle();
m_previous_theme_highlight_color = palette().color(QPalette::Highlight);
}
p.drawPixmap(0, 0, m_pixmapGradient, 0, 0, offset + padding, 0);
p.drawPixmap(0, 0, m_pixmapInset);
p.drawPixmap(offset - m_handlePixmaps[0].width() / 2 + padding, 0,
@ -345,7 +332,7 @@ void Amarok::VolumeSlider::paletteChange(const QPalette&) {
generateGradient();
}
QPixmap Amarok::VolumeSlider::volumePixmapDraw () const {
QPixmap Amarok::VolumeSlider::drawVolumePixmap () const {
QPixmap pixmap(112, 36);
pixmap.fill(Qt::transparent);
QPainter painter(&pixmap);
@ -366,3 +353,41 @@ QPixmap Amarok::VolumeSlider::volumePixmapDraw () const {
// Return QPixmap
return pixmap;
}
void Amarok::VolumeSlider::drawVolumeSliderHandle() {
QImage pixmapHandle(":volumeslider-handle.png");
QImage pixmapHandleGlow(":/volumeslider-handle_glow.png");
QImage pixmapHandleGlow_image(pixmapHandleGlow.size(), QImage::Format_ARGB32_Premultiplied);
QPainter painter(&pixmapHandleGlow_image);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::SmoothPixmapTransform);
// repaint volume slider handle glow image with theme highlight color
painter.fillRect(pixmapHandleGlow_image.rect(), QBrush(palette().color(QPalette::Highlight)));
painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
painter.drawImage(0, 0, pixmapHandleGlow);
// Overlay the volume slider handle image
painter.setCompositionMode(QPainter::CompositionMode_SourceAtop);
painter.drawImage(0, 0, pixmapHandle);
// BEGIN Calculate handle animation pixmaps for mouse-over effect
float opacity = 0.0;
const float step = 1.0 / ANIM_MAX;
QImage dst;
m_handlePixmaps.clear();
for (int i = 0; i < ANIM_MAX; ++i) {
dst = pixmapHandle.copy();
QPainter p(&dst);
p.setOpacity(opacity);
p.drawImage(0, 0, pixmapHandleGlow_image);
p.end();
m_handlePixmaps.append(QPixmap::fromImage(dst));
opacity += step;
}
// END
}

4
src/widgets/sliderwidget.h
View File

@ -98,7 +98,6 @@ class VolumeSlider : public Slider {
public:
VolumeSlider(QWidget* parent, uint max = 0);
QPixmap volumePixmapDraw() const;
protected:
virtual void paintEvent(QPaintEvent*);
@ -115,6 +114,8 @@ class VolumeSlider : public Slider {
private:
void generateGradient();
QPixmap drawVolumePixmap() const;
void drawVolumeSliderHandle();
VolumeSlider(const VolumeSlider&); // undefined
VolumeSlider& operator=(const VolumeSlider&); // undefined
@ -131,6 +132,7 @@ class VolumeSlider : public Slider {
QPixmap m_pixmapGradient;
QColor m_previous_theme_text_color;
QColor m_previous_theme_highlight_color;
QList<QPixmap> m_handlePixmaps;
};